“Gross, Histochemical and Electron Microscopical Characterization of the Pecten Oculi of Baladi Ducks (Anas Boschas Domesticus)”. Journal of Advanced Veterinary and Animal Research, vol. 6, no. 4, Nov. 2019, pp. 456-62, https://www.banglajol.info/index.php/JAVAR/article/view/44114.